The abdomen of a free-living female of Strepsiptera and the evolution of the birth organs.

Abstract:

:Mengenillidae is a small, basal family of Strepsiptera, mainly characterized by free-living females in contrast to the endoparasitic females of Stylopidia. Here, we describe external and internal structures of the female abdomen of Eoxenos laboulbenei (Mengenillidae). The external morphology was examined and documented using microphotography. Internal structures were reconstructed three-dimensionally using a μCT-data set. The morphologically simplified abdomen comprises 10 segments. The integument is weakly sclerotized and flexible. Spiracles are present dorsolaterally on segments I-VII. Segment VII bears the posteroventral birth opening and the small abdominal segment X carries the anus at its apex. Numerous eggs float freely in the hemolymph. The musculature of segments I-IV is composed of ventral and dorsal longitudinal muscle bundles, strongly developed paramedial dorsoventral muscles and a complex meshwork of small pleural muscles, with minimal differences between the segments. Segments V-X contain more than 50 individual muscles, even though the musculature as a whole is weakly developed. Even though it is not involved in processing food, the digestive tract is well-developed. Its postabdominal section comprises a part of the midgut and the short hindgut. The midgut fills a large part of the postabdominal lumen. The lumina of the midgut and hindgut are not connected. Five or six nodular Malpighian tubules open into the digestive tract at the border region between the midgut and hindgut. The birth organ below the midgut releases the primary larvae after hatching via the birth opening at segment VII. It is likely derived from primary female genital ducts. The presence of six additional birth organs of segments I-VI are de novo formations and a groundplan apomorphy of Stylopidia, the large strepsipteran subgroup with endoparasitic females. The loss of the primary birth organ of segment VII is an apomorphy of Stylopiformia (Stylopidia excl. Corioxenidae).

journal_name

J Morphol

journal_title

Journal of morphology

authors

Tröger D,Beutel RG,Pohl H

doi

10.1002/jmor.20981

subject

Has Abstract

pub_date

2019-05-01 00:00:00

pages

739-755

issue

5

eissn

0362-2525

issn

1097-4687

journal_volume

280

pub_type

杂志文章
  • Composition and ultrastructure of the byssus of Mytilus edulis.

    abstract::Three regions of the byssus of the marine mussel Mytilus edulis L. are distinct in structural organization at the macroscopic and microscopic level and in amino acid composition. The threads that emanate from the stem at the base of the foot are divided into two regions. The proximal, elastic region has a crimped, den...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.1051890305

    authors: Benedict CV,Waite JH

    更新日期:1986-09-01 00:00:00

  • The skull of the Round Island boa, Casarea dussumieri Schlegel, based on high-resolution X-ray computed tomography.

    abstract::The skull of the rare bolyeriid snake Casarea dussumieri is described in detail based on high-resolution X-ray CT data. Bolyeriids are unique in their possession of a separate suborbital ossification and a maxilla subdivided into two movably jointed parts, which may be the result of paedomorphic truncation of the deve...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.10519

    authors: Maisano JA,Rieppel O

    更新日期:2007-05-01 00:00:00

  • Orientation of the lateral semicircular canal in Xenarthra and its links with head posture and phylogeny.

    abstract::The orientation of the semicircular canals of the inner ear in the skull of vertebrates is one of the determinants of the capacity of this system to detect a given rotational movement of the head. Past functional studies on the spatial orientation of the semicircular canals essentially focused on the lateral semicircu...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.20665

    authors: Coutier F,Hautier L,Cornette R,Amson E,Billet G

    更新日期:2017-05-01 00:00:00

  • Heterochrony in mandible development of larval shrimp (Decapoda: Caridea)--a comparative morphological SEM study of two carideans.

    abstract::Mandible development in the larval stages I-V of two palaemonid shrimp species, Palaemon elegans and Macrobrachium amazonicum, was analyzed using scanning electron microscopy, light microscopy, and confocal laser scanning microscopy. In contrast to the zoea I of P. elegans, first-stage larvae of M. amazonicum are nonf...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.20299

    authors: Batel A,Melzer RR,Anger K,Geiselbrecht H

    更新日期:2014-11-01 00:00:00

  • Development of bioluminescence and photophores in the midshipman fish, Porichthys notatus.

    abstract::Correlative studies of luminescent responses, light and electron microscopy of Porichthys photophores during development were conducted. The photophores differentiate as an outgrowth of the basal cell layer of the epidermis, from which they delaminate into the dermis. Reflector cells are formed from dermal fibroblasts...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.1051510305

    authors: Anctil M

    更新日期:1977-03-01 00:00:00

  • Occipital spine of Orthacanthus (Xenacanthidae, Elasmobranchii): structure and growth.

    abstract::The morphology of 16 occipital spines of the xenacanthid Orthacanthus from Upper Carboniferous deposits of Robinson (Kansas, USA), Nýran (Czech Republic) and Puertollano (Spain) is described. The nonreplaced spines reveal the growth pattern of the shark. Moreover, the relationship between growth and paleoenvironmental...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/(SICI)1097-4687(199910)242:1<1::AID-JMOR2>

    authors: Soler-Gijón R

    更新日期:1999-10-01 00:00:00

  • Architectonic constraints on the hyoid's optimal starting position for suction feeding of fish.

    abstract::During suction feeding teleost fish have to start mouth opening prior to other expansion movements of the head such as operculo-suspensorium abduction. The distribution of the input force over the various expansion movements is determined by the position of the hyoid in the expansion apparatus. Based on a three-dimens...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/(SICI)1097-4687(199604)228:1<1::AID-JMOR1>

    authors: De Visser J,Barel CDN

    更新日期:1996-04-01 00:00:00

  • Electron microscopic characterization of nuclear egress in the sea urchin gastrula.

    abstract::Nuclear egress, also referred to as nuclear envelope (NE) budding, is a process of transport in which vesicles containing molecular complexes or viral particles leave the nucleus through budding from the inner nuclear membrane (INM) to enter the perinuclear space. Following this event, the perinuclear vesicles (PNVs) ...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.20796

    authors: LaMassa N,Arenas-Mena C,Phillips GR

    更新日期:2018-05-01 00:00:00

  • External and internal sexual dimorphism in leiognathid fishes: morphological evidence for sex-specific bioluminescent signaling.

    abstract::Fourteen species of leiognathid fishes (Perciformes, Leiognathidae) from the Philippine Islands, Thailand, Japan, Indonesia, and Palau were examined for accessory secondary sexual dimorphism. Thirteen species exhibit either external dimorphism (a clear patch of skin on the flanks of males, a large clear patch of skin ...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.1051820105

    authors: McFall-Ngai MJ,Dunlap PV

    更新日期:1984-10-01 00:00:00

  • Lectin histochemistry of the hyaline layer around the larvae of Patiriella species (Asteroidea) with different developmental modes.

    abstract::Larvae of sea stars are surrounded by an extracellular matrix called the hyaline layer. The lectin-binding properties of this matrix were investigated in an ultrastructural study of Patiriella species having different modes of development. The planktonic bipinnaria and brachiolaria of P. regularis and the planktonic b...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/(SICI)1097-4687(199911)242:2<91::AID-JMOR2

    authors: Cerra A

    更新日期:1999-11-01 00:00:00

  • Alterations of endocrine pancreas B cells in a sahelian reptile (Varanus exanthematicus) during starvation.

    abstract::During the long starvation period (November to June) of the lizard (Varanus exanthematicus), pancreatic B cells undergo profound modification. The degeneration of beta granules observed in electron microscopy appears correlated with the diminution of the immunoreactive insulin-like content of the pancreas. The analogy...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.1051800302

    authors: Godet R,Mattei X,Dupé-Godet M

    更新日期:1984-06-01 00:00:00

  • Structure of ivory.

    abstract::Profiles with all orientations have been used to visualize the 3D structure of ivory from tusks of elephant, mammoth, walrus, hippopotamus, pig (bush, boar, and warthog), sperm whale, killer whale, and narwhal. Polished, forming, fractured, aged, and stained surfaces were prepared for microscopy using epi-illumination...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.10585

    authors: Locke M

    更新日期:2008-04-01 00:00:00

  • External genital morphology of the ring-tailed lemur (Lemur catta): females are naturally "masculinized".

    abstract::The extravagance and diversity of external genitalia have been well characterized in male primates; however, much less is known about sex differences or variation in female form. Our study represents a departure from traditional investigations of primate reproductive anatomy because we 1) focus on external rather than...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.10594

    authors: Drea CM,Weil A

    更新日期:2008-04-01 00:00:00

  • The caudal neurosecretory system and its afferent synapses in the goldfish, Carassius auratus: morphology, immunohistochemistry, and fine structure.

    abstract::Morphological features of the goldfish caudal neurosecretory system were investigated by means of immunohistochemical localization of urotensins I and II (UI and UII) and electron microscopic examination of the caudal neurosecretory neurons, the urophysis, and the synaptic neuropil. The aim of the work is to provide a...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/(SICI)1097-4687(199801)235:1<59::AID-JMOR5

    authors: Cioni C,De Vito L,Greco A,Pepe A

    更新日期:1998-01-01 00:00:00

  • The larval head structures of Podagricomela shirahatai (Chûjô) (Chrysomelidae, Galerucinae, Alticini) and morphological effects of leaf mining.

    abstract::Head structures of the leaf mining larva of the chrysomelid species Podagricomela shirahatai are described and illustrated. Internal and external structures were reconstructed three dimensionally based on image stacks obtained with microcomputed tomography. The larval head is characterized by prognathism, a dorsoventr...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.20352

    authors: Hua Y,Beutel RG,Ge SQ,Yang XK

    更新日期:2015-04-01 00:00:00

  • The reproductive cycle of the male sleep snake Sibynomorphus mikanii (Schlegel, 1837) from southeastern Brazil.

    abstract::This study describes the male reproductive cycle of Sibynomorphus mikanii from southeastern Brazil considering macroscopic and microscopic variables. Spermatogenesis occurs during spring-summer (September-December) and spermiogenesis or maturation occurs in summer (December-February). The length and width of the kidne...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.20099

    authors: Rojas CA,Barros VA,Almeida-Santos SM

    更新日期:2013-02-01 00:00:00

  • Genital morphology associated with mating strategy in the polymorphic lizard, Uta stansburiana.

    abstract::Sexual selection can lead to rapid evolution of sexual traits and striking morphological diversity across taxa. In populations where competition for mates is intense, males sometimes evolve distinct behavioral strategies along with morphological differences that help them secure mating opportunities. Strong postcopula...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.20930

    authors: Gilman CA,Corl A,Sinervo B,Irschick DJ

    更新日期:2019-02-01 00:00:00

  • Fine structure and functional morphology of the mouthparts of a male Veigaia sp. (Gamasida: Veigaiidae) with remarks on the spermatodactyl and related sensory structures.

    abstract::Mites of the genus Veigaia are common gamasid inhabitants of forest litter. They engage in the peculiar reproductive strategy of podospermy which, along with other morphological and behavioral adaptations, involves modification of the chelicerae of the relatively rare males into gonopods. Each movable digit is provide...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.10393

    authors: Di Palma A,Alberti G,Nuzzaci G,Krantz GW

    更新日期:2006-02-01 00:00:00

  • Lung morphology of cursorial and non-cursorial mammals: lagomorphs as a case study for a pneumatic stabilization hypothesis.

    abstract::Gross lung morphology is examined in representative species from four genera within the order Lagomorpha (Lepus californicus, Sylvilagus nuttalli, Oryctolagus cuniculus, Ochotona princeps), and compared with a representative rodent out-group (Spermophilus richardonsii). Examination of pulmonary morphology reveals seve...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/(SICI)1097-4687(199612)230:3<299::AID-JMOR

    authors: Simons RS

    更新日期:1996-12-01 00:00:00

  • Morphology, microstructure, crystallography, and chemistry of distinct CaCO3 deposits formed by early recruits of the scleractinian coral Pocillopora damicornis.

    abstract::Scleractinian corals begin their biomineralization process shortly after larval settlement with the formation of calcium carbonate (CaCO(3)) structures at the interface between the larval tissues and the substrate. The newly settled larvae exert variable degrees of control over this skeleton formation, providing an op...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.20401

    authors: Gilis M,Meibom A,Alexander D,Grauby O,Stolarski J,Baronnet A

    更新日期:2015-10-01 00:00:00

  • A model to explain the posterior limit of the bite point in reptiles.

    abstract::A biomechanical model of the jaw mechanism in some reptiles is presented. Symmetrical muscle activity that produces equal forces on both sides of the head is assumed. The model predicts the position of the most posterior bit point and offers a functional explanation for this prediction. Turtles are used to illustrate ...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.1051600204

    authors: Druzinsky RE,Greaves WS

    更新日期:1979-05-01 00:00:00

  • Embryonic stages of Gastrotheca riobambae (Fowler) during maternal incubation and comparison of development with that of other egg-brooding hylid frogs.

    abstract::A table of development (25 stages) for the period of incubation in the pouch was constructed for Gastrotheca riobambae; it can be used to stage embryos of other egg-brooding hylids. Analysis of embryonic weights during incubation shows that the mother does not contribute nutrients, but gases and other factors are prob...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.1051670303

    authors: del Pino EM,Escobar B

    更新日期:1981-03-01 00:00:00

  • Ontogenetic allometry constrains cranial shape of the head-first burrowing worm lizard Cynisca leucura (Squamata: Amphisbaenidae).

    abstract::Amphisbaenians are fossorial, predominantly limbless squamate reptiles with distinct cranial shapes corresponding to specific burrowing behaviors. Due to their cryptic lifestyles and the scarcity of museum specimens, little is known of their intraspecific variation, particularly regarding cranial osteology. This repre...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.20564

    authors: Hipsley CA,Rentinck MN,Rödel MO,Müller J

    更新日期:2016-09-01 00:00:00

  • Reproductive role of attaching filaments on the egg envelope in Xenopoecilus sarasinorum (Adrianichthidae, teleostei).

    abstract::Eggs of Xenopoecilus sarasinorum possess two distinct types of filaments on the surface of the egg envelope (chorion), long, attaching filaments restricted to the vegetal pole and weak, nonattaching filaments around the animal pole (micropyle). Both types are formed during oogenesis. After mature eggs were spawned thr...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.10620

    authors: Iwamatsu T,Kobayashi H,Sato M,Yamashita M

    更新日期:2008-06-01 00:00:00

  • Pharyngeal mastication and food transport in the carp (Cyprinus carpio L.): A cineradiographic and electromyographic study.

    abstract::Cyprinids constitute the largest fish family and are characterized by their pharyngeal teeth. The masticatory mechanism is still poorly understood. The complex of structures that determine the movements of pharyngeal teeth and chewing pad in the carp (Cyprinus carpio L.) is analyzed. Activities in 16 head muscles of a...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.1051720208

    authors: Sibbing FA

    更新日期:1982-05-01 00:00:00

  • Roles of actin networks in peristaltic squeezing of sperm bundles in Bombyx mori.

    abstract::Two types of sperm are produced in the silkworm, Bombyx mori. Nucleate eupyrene sperm is an ordinary sperm that contributes to fertilization, while anucleate apyrene sperm is considered to play important roles in assisting eupyrene sperm. At the very late stage of spermatogenesis, a phenomenon called "peristaltic sque...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.10168

    authors: Sahara K,Kawamura N

    更新日期:2004-01-01 00:00:00

  • Interspecific variations in the morphology and ultrastructure of the rhabdoms of oplophorid shrimps.

    abstract::Interspecific variations in rhabdom structure between various oplophorid shrimps are described and the differences are related to the light environment at different depths within the mesopelagic zone. The ultrastructure of the distal rhabdom in these species is described for the first time. Quantitative measurements s...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.10103

    authors: Gaten E,Shelton PM,Nowel MS

    更新日期:2003-07-01 00:00:00

  • Traits and evolution of wing venation pattern in paraneopteran insects.

    abstract::Two different patterns of wing venation are currently supposed to be present in each of the three orders of Paraneoptera. This is unlikely compared with the situation in other insects where only one pattern exists per order. We propose for all Paraneoptera a new and unique interpretation of wing venation pattern, assu...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.11036

    authors: Nel A,Prokop J,Nel P,Grandcolas P,Huang DY,Roques P,Guilbert E,Dostál O,Szwedo J

    更新日期:2012-05-01 00:00:00

  • Ultrastructure of erythrocytes and leucocytes of Priapulus caudatus (de Lamarck) (Priapulida).

    abstract::The marine priapulid Priapulus caudatus has a voluminous body cavity filled with a blood-like fluid containing erythrocytes and leucocytes (amoebocytes). The hematocrit of animals weighing 0.5-14 gm was 2-10%. The erythrocytes contain a hemerythrin blood pigment. The structure of the coelomocytes was studied by light ...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.1051400309

    authors: Mattisson A,Fänge R

    更新日期:1973-07-01 00:00:00

  • Localization of 3H-estradiol in the reproductive organs of male and female baboons.

    abstract::The uptake and retention of radiolabeled estradiol by both the male and female reproductive organs were examined in the baboon. Two male and two female baboons were injected intracardially with 1 microgram/kg body weight of 3H-estradiol and two animals, one male and one female, were injected with both labeled and 100 ...

    journal_title:Journal of morphology

    pub_type: 杂志文章

    doi:10.1002/jmor.1051720203

    authors: Weaker FJ,Sheridan PJ

    更新日期:1982-05-01 00:00:00